Improvement in burglar-alarms



A. NEVLING.

Burglar-Alarms. v No.153,779. Paten tedAug. 4,187 4.

WITNESSES: INVENTOB L M I ATTBBNEYS.

THE GRAPHIC CO- QHGID-LIT'PLSSBHH PARK PLACEJLY.

UNITED STATES PATENT OFFICE.

ABRAHAM NEVLING, O13 GLEN HOPE, PENNSYLVANIA.

IMPROVEMENT IN BURGLAR-ALARMS.

Specification forming part of Letters Patent N 153,779, dated August 4,1874; application filed May 29, 1874.

To all whom it may concern:

Be it known that I, ABRAHAM NEVLING, of Glen Hope, in the county ofOlearfield and State of Pennsylvania, have invented a new and ImprovedBurglar-Alarm, of which the following is a specification:

My invention consists of a lever to hold the escapement of aclockmechanism from working, and a slide to raise the lever and allow. theescapement to work, so combined with a clock mechanism and an alarm-bellthat the slide may be set by a door or window, so 1 to be moved in casethe door or window is opened, and lift the lever oil from the escapementand allow the'bell to sound; and the connection of the slide and leveris such that they can be disconnected and allow the slide to be pushedback from the door or window during the day-time without allowing thebell to.

verge by said arm, or it may be by the hammer-lever, so as to preventthe spring from working the hammer when it is not required to sound thebell. F is a slide with a beveled or inclined point, G, and having acouple of stud-pins, H, projecting from it, between which the weightedlever E passes, so that when the slide is moved upward it will liftv thelever from the verge and free the appara-. tus so as to sound.

This slide is to be set in such relation to a door or window that, incase the door or window is opened when the slide is pulled down, it willbe pushed up by the door or window, and will lift the lever off theverge, so that the'hammer will be operated.

To enable the slide to be shoved back during the day without freeing thealarm, the lever E is lifted out from between the studpins and rested onthe pin J.

I do not claim the combination of a sliding .bar and a holding devicewith the spring

